pybind11Tools.cmake (11986:c12e4625ab56) | pybind11Tools.cmake (12037:d28054ac6ec9) |
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1# tools/pybind11Tools.cmake -- Build system for the pybind11 modules 2# 3# Copyright (c) 2015 Wenzel Jakob <wenzel@inf.ethz.ch> 4# 5# All rights reserved. Use of this source code is governed by a 6# BSD-style license that can be found in the LICENSE file. 7 8cmake_minimum_required(VERSION 2.8.12) 9 10# Add a CMake parameter for choosing a desired Python version | 1# tools/pybind11Tools.cmake -- Build system for the pybind11 modules 2# 3# Copyright (c) 2015 Wenzel Jakob <wenzel@inf.ethz.ch> 4# 5# All rights reserved. Use of this source code is governed by a 6# BSD-style license that can be found in the LICENSE file. 7 8cmake_minimum_required(VERSION 2.8.12) 9 10# Add a CMake parameter for choosing a desired Python version |
11set(PYBIND11_PYTHON_VERSION "" CACHE STRING "Python version to use for compiling modules") | 11if(NOT PYBIND11_PYTHON_VERSION) 12 set(PYBIND11_PYTHON_VERSION "" CACHE STRING "Python version to use for compiling modules") 13endif() |
12 13set(Python_ADDITIONAL_VERSIONS 3.7 3.6 3.5 3.4) 14find_package(PythonLibsNew ${PYBIND11_PYTHON_VERSION} REQUIRED) 15 16include(CheckCXXCompilerFlag) | 14 15set(Python_ADDITIONAL_VERSIONS 3.7 3.6 3.5 3.4) 16find_package(PythonLibsNew ${PYBIND11_PYTHON_VERSION} REQUIRED) 17 18include(CheckCXXCompilerFlag) |
19include(CMakeParseArguments) |
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17 18function(select_cxx_standard) 19 if(NOT MSVC AND NOT PYBIND11_CPP_STANDARD) 20 check_cxx_compiler_flag("-std=c++14" HAS_CPP14_FLAG) 21 check_cxx_compiler_flag("-std=c++11" HAS_CPP11_FLAG) 22 23 if (HAS_CPP14_FLAG) 24 set(PYBIND11_CPP_STANDARD -std=c++14) 25 elseif (HAS_CPP11_FLAG) 26 set(PYBIND11_CPP_STANDARD -std=c++11) 27 else() 28 message(FATAL_ERROR "Unsupported compiler -- pybind11 requires C++11 support!") 29 endif() 30 31 set(PYBIND11_CPP_STANDARD ${PYBIND11_CPP_STANDARD} CACHE STRING 32 "C++ standard flag, e.g. -std=c++11 or -std=c++14. Defaults to latest available." FORCE) 33 endif() 34endfunction() 35 | 20 21function(select_cxx_standard) 22 if(NOT MSVC AND NOT PYBIND11_CPP_STANDARD) 23 check_cxx_compiler_flag("-std=c++14" HAS_CPP14_FLAG) 24 check_cxx_compiler_flag("-std=c++11" HAS_CPP11_FLAG) 25 26 if (HAS_CPP14_FLAG) 27 set(PYBIND11_CPP_STANDARD -std=c++14) 28 elseif (HAS_CPP11_FLAG) 29 set(PYBIND11_CPP_STANDARD -std=c++11) 30 else() 31 message(FATAL_ERROR "Unsupported compiler -- pybind11 requires C++11 support!") 32 endif() 33 34 set(PYBIND11_CPP_STANDARD ${PYBIND11_CPP_STANDARD} CACHE STRING 35 "C++ standard flag, e.g. -std=c++11 or -std=c++14. Defaults to latest available." FORCE) 36 endif() 37endfunction() 38 |
39# Checks whether the given CXX/linker flags can compile and link a cxx file. cxxflags and 40# linkerflags are lists of flags to use. The result variable is a unique variable name for each set 41# of flags: the compilation result will be cached base on the result variable. If the flags work, 42# sets them in cxxflags_out/linkerflags_out internal cache variables (in addition to ${result}). 43function(_pybind11_return_if_cxx_and_linker_flags_work result cxxflags linkerflags cxxflags_out linkerflags_out) 44 set(CMAKE_REQUIRED_LIBRARIES ${linkerflags}) 45 check_cxx_compiler_flag("${cxxflags}" ${result}) 46 if (${result}) 47 set(${cxxflags_out} "${cxxflags}" CACHE INTERNAL "" FORCE) 48 set(${linkerflags_out} "${linkerflags}" CACHE INTERNAL "" FORCE) 49 endif() 50endfunction() 51 52# Internal: find the appropriate link time optimization flags for this compiler 53function(_pybind11_add_lto_flags target_name prefer_thin_lto) 54 if (NOT DEFINED PYBIND11_LTO_CXX_FLAGS) 55 set(PYBIND11_LTO_CXX_FLAGS "" CACHE INTERNAL "") 56 set(PYBIND11_LTO_LINKER_FLAGS "" CACHE INTERNAL "") 57 58 if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang") 59 set(cxx_append "") 60 set(linker_append "") 61 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND NOT APPLE) 62 # Clang Gold plugin does not support -Os; append -O3 to MinSizeRel builds to override it 63 set(linker_append ";$<$<CONFIG:MinSizeRel>:-O3>") 64 elseif(CMAKE_CXX_COMPILER_ID MATCHES "GNU") 65 set(cxx_append ";-fno-fat-lto-objects") 66 endif() 67 68 if (CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND prefer_thin_lto) 69 _pybind11_return_if_cxx_and_linker_flags_work(HAS_FLTO_THIN 70 "-flto=thin${cxx_append}" "-flto=thin${linker_append}" 71 PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS) 72 endif() 73 74 if (NOT HAS_FLTO_THIN) 75 _pybind11_return_if_cxx_and_linker_flags_work(HAS_FLTO 76 "-flto${cxx_append}" "-flto${linker_append}" 77 PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS) 78 endif() 79 elseif (CMAKE_CXX_COMPILER_ID MATCHES "Intel") 80 # Intel equivalent to LTO is called IPO 81 _pybind11_return_if_cxx_and_linker_flags_work(HAS_INTEL_IPO 82 "-ipo" "-ipo" PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS) 83 elseif(MSVC) 84 # cmake only interprets libraries as linker flags when they start with a - (otherwise it 85 # converts /LTCG to \LTCG as if it was a Windows path). Luckily MSVC supports passing flags 86 # with - instead of /, even if it is a bit non-standard: 87 _pybind11_return_if_cxx_and_linker_flags_work(HAS_MSVC_GL_LTCG 88 "/GL" "-LTCG" PYBIND11_LTO_CXX_FLAGS PYBIND11_LTO_LINKER_FLAGS) 89 endif() 90 91 if (PYBIND11_LTO_CXX_FLAGS) 92 message(STATUS "LTO enabled") 93 else() 94 message(STATUS "LTO disabled (not supported by the compiler and/or linker)") 95 endif() 96 endif() 97 98 # Enable LTO flags if found, except for Debug builds 99 if (PYBIND11_LTO_CXX_FLAGS) 100 target_compile_options(${target_name} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:${PYBIND11_LTO_CXX_FLAGS}>") 101 endif() 102 if (PYBIND11_LTO_LINKER_FLAGS) 103 target_link_libraries(${target_name} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:${PYBIND11_LTO_LINKER_FLAGS}>") 104 endif() 105endfunction() 106 |
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36# Build a Python extension module: | 107# Build a Python extension module: |
37# pybind11_add_module(<name> [MODULE | SHARED] [EXCLUDE_FROM_ALL] source1 [source2 ...]) | 108# pybind11_add_module( 109# [NO_EXTRAS] [THIN_LTO] source1 [source2 ...]) |
38# 39function(pybind11_add_module target_name) | 110# 111function(pybind11_add_module target_name) |
40 set(lib_type "MODULE") 41 set(do_lto True) 42 set(exclude_from_all "") 43 set(sources "") | 112 set(options MODULE SHARED EXCLUDE_FROM_ALL NO_EXTRAS THIN_LTO) 113 cmake_parse_arguments(ARG "${options}" "" "" ${ARGN}) |
44 | 114 |
45 set(_args_to_try "${ARGN}") 46 foreach(_ex_arg IN LISTS _args_to_try) 47 if(${_ex_arg} STREQUAL "MODULE") 48 set(lib_type "MODULE") 49 elseif(${_ex_arg} STREQUAL "SHARED") 50 set(lib_type "SHARED") 51 elseif(${_ex_arg} STREQUAL "EXCLUDE_FROM_ALL") 52 set(exclude_from_all "EXCLUDE_FROM_ALL") 53 else() 54 list(APPEND sources "${_ex_arg}") 55 endif() 56 endforeach() | 115 if(ARG_MODULE AND ARG_SHARED) 116 message(FATAL_ERROR "Can't be both MODULE and SHARED") 117 elseif(ARG_SHARED) 118 set(lib_type SHARED) 119 else() 120 set(lib_type MODULE) 121 endif() |
57 | 122 |
58 add_library(${target_name} ${lib_type} ${exclude_from_all} ${sources}) | 123 if(ARG_EXCLUDE_FROM_ALL) 124 set(exclude_from_all EXCLUDE_FROM_ALL) 125 endif() |
59 | 126 |
127 add_library(${target_name} ${lib_type} ${exclude_from_all} ${ARG_UNPARSED_ARGUMENTS}) 128 |
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60 target_include_directories(${target_name} 61 PRIVATE ${PYBIND11_INCLUDE_DIR} # from project CMakeLists.txt 62 PRIVATE ${pybind11_INCLUDE_DIR} # from pybind11Config 63 PRIVATE ${PYTHON_INCLUDE_DIRS}) 64 65 # The prefix and extension are provided by FindPythonLibsNew.cmake 66 set_target_properties(${target_name} PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}") 67 set_target_properties(${target_name} PROPERTIES SUFFIX "${PYTHON_MODULE_EXTENSION}") --- 12 unchanged lines hidden (view full) --- 80 81 # Windows is not affected by this issue since it handles DLL imports 82 # differently. The solution for Linux and Mac OS is simple: we just don't 83 # link against the Python library. The resulting shared library will have 84 # missing symbols, but that's perfectly fine -- they will be resolved at 85 # import time. 86 87 target_link_libraries(${target_name} PRIVATE "-undefined dynamic_lookup") | 129 target_include_directories(${target_name} 130 PRIVATE ${PYBIND11_INCLUDE_DIR} # from project CMakeLists.txt 131 PRIVATE ${pybind11_INCLUDE_DIR} # from pybind11Config 132 PRIVATE ${PYTHON_INCLUDE_DIRS}) 133 134 # The prefix and extension are provided by FindPythonLibsNew.cmake 135 set_target_properties(${target_name} PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}") 136 set_target_properties(${target_name} PROPERTIES SUFFIX "${PYTHON_MODULE_EXTENSION}") --- 12 unchanged lines hidden (view full) --- 149 150 # Windows is not affected by this issue since it handles DLL imports 151 # differently. The solution for Linux and Mac OS is simple: we just don't 152 # link against the Python library. The resulting shared library will have 153 # missing symbols, but that's perfectly fine -- they will be resolved at 154 # import time. 155 156 target_link_libraries(${target_name} PRIVATE "-undefined dynamic_lookup") |
157 158 if(ARG_SHARED) 159 # Suppress CMake >= 3.0 warning for shared libraries 160 set_target_properties(${target_name} PROPERTIES MACOSX_RPATH ON) 161 endif() |
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88 endif() 89 90 select_cxx_standard() 91 if(NOT MSVC) 92 # Make sure C++11/14 are enabled 93 target_compile_options(${target_name} PUBLIC ${PYBIND11_CPP_STANDARD}) | 162 endif() 163 164 select_cxx_standard() 165 if(NOT MSVC) 166 # Make sure C++11/14 are enabled 167 target_compile_options(${target_name} PUBLIC ${PYBIND11_CPP_STANDARD}) |
168 endif() |
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94 | 169 |
95 # Enable link time optimization and set the default symbol 96 # visibility to hidden (very important to obtain small binaries) 97 string(TOUPPER "${CMAKE_BUILD_TYPE}" U_CMAKE_BUILD_TYPE) 98 if (NOT ${U_CMAKE_BUILD_TYPE} MATCHES DEBUG) 99 # Check for Link Time Optimization support (GCC/Clang) 100 check_cxx_compiler_flag("-flto" HAS_LTO_FLAG) 101 if(HAS_LTO_FLAG AND NOT CYGWIN) 102 target_compile_options(${target_name} PRIVATE -flto) 103 endif() | 170 if(ARG_NO_EXTRAS) 171 return() 172 endif() |
104 | 173 |
105 # Intel equivalent to LTO is called IPO 106 if(CMAKE_CXX_COMPILER_ID MATCHES "Intel") 107 check_cxx_compiler_flag("-ipo" HAS_IPO_FLAG) 108 if(HAS_IPO_FLAG) 109 target_compile_options(${target_name} PRIVATE -ipo) 110 endif() 111 endif() | 174 _pybind11_add_lto_flags(${target_name} ${ARG_THIN_LTO}) |
112 | 175 |
113 # Default symbol visibility 114 target_compile_options(${target_name} PRIVATE "-fvisibility=hidden") | 176 if (NOT MSVC AND NOT ${CMAKE_BUILD_TYPE} MATCHES Debug) 177 # Set the default symbol visibility to hidden (very important to obtain small binaries) 178 target_compile_options(${target_name} PRIVATE "-fvisibility=hidden") |
115 | 179 |
116 # Strip unnecessary sections of the binary on Linux/Mac OS 117 if(CMAKE_STRIP) 118 if(APPLE) 119 add_custom_command(TARGET ${target_name} POST_BUILD 120 COMMAND ${CMAKE_STRIP} -u -r $<TARGET_FILE:${target_name}>) 121 else() 122 add_custom_command(TARGET ${target_name} POST_BUILD 123 COMMAND ${CMAKE_STRIP} $<TARGET_FILE:${target_name}>) 124 endif() | 180 # Strip unnecessary sections of the binary on Linux/Mac OS 181 if(CMAKE_STRIP) 182 if(APPLE) 183 add_custom_command(TARGET ${target_name} POST_BUILD 184 COMMAND ${CMAKE_STRIP} -x $<TARGET_FILE:${target_name}>) 185 else() 186 add_custom_command(TARGET ${target_name} POST_BUILD 187 COMMAND ${CMAKE_STRIP} $ |
125 endif() 126 endif() | 188 endif() 189 endif() |
127 elseif(MSVC) | 190 endif() 191 192 if(MSVC) |
128 # /MP enables multithreaded builds (relevant when there are many files), /bigobj is 129 # needed for bigger binding projects due to the limit to 64k addressable sections 130 target_compile_options(${target_name} PRIVATE /MP /bigobj) | 193 # /MP enables multithreaded builds (relevant when there are many files), /bigobj is 194 # needed for bigger binding projects due to the limit to 64k addressable sections 195 target_compile_options(${target_name} PRIVATE /MP /bigobj) |
131 132 # Enforce link time code generation on MSVC, except in debug mode 133 target_compile_options(${target_name} PRIVATE $<$<NOT:$<CONFIG:Debug>>:/GL>) 134 135 # Fancy generator expressions don't work with linker flags, for reasons unknown 136 set_property(TARGET ${target_name} APPEND_STRING PROPERTY LINK_FLAGS_RELEASE /LTCG) 137 set_property(TARGET ${target_name} APPEND_STRING PROPERTY LINK_FLAGS_MINSIZEREL /LTCG) 138 set_property(TARGET ${target_name} APPEND_STRING PROPERTY LINK_FLAGS_RELWITHDEBINFO /LTCG) | |
139 endif() 140endfunction() | 196 endif() 197endfunction() |